EYOLUTION AND ANIMAL LIFE 



AN ELEMENTARY DISCUSSION OF 



FACTS, PROCESSES, LAWS AND THEORIES RELAriNG 

 TO THE LIFE AND EVOLUTION OF ANIMALS 



BY 



DAVID STARR JORDAN 



PRESIDENT OF LELAND STANFORD JUNIOR UNIVERSITY 



AND 



VERNON LYMAN KELLOGG 



PROFESSOR OF ENTOMOLOGY, AND LECTURER IN BIONOMICS 

 IN LELAND STANFORD JUNIOR UNIVERSITY 



Time, whose tooth gnaws away everything 

 else, is powerless against Truth.— Huxley. 



NEW YORK AND LONDON 



D. APPLETON AND COMPANY 



1920 



